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ISSN 0254-0096 CN 11-2082/K

Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12): 119-123.DOI: 10.19912/j.0254-0096.tynxb.2021-0754

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INFLUENCES OF IMPURITY CHLORIDE ION ON CORROSION OF NEW QUATERNARY NITRATE

Gao Qi, Lu Yuanwei, Yu Qiang, Song Wenbing, Wu Yuting   

  1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion of Beijing, Beijing University of Technology, Beijing 100124, China
  • Received:2021-07-01 Online:2022-12-28 Published:2023-06-28

杂质氯离子对新型四元硝酸盐腐蚀性的影响

高祺, 鹿院卫, 于强, 宋文兵, 吴玉庭   

  1. 传热强化与过程节能教育部重点实验室暨传热与能源利用北京市重点实验室,北京工业大学,北京 100124
  • 通讯作者: 鹿院卫(1971—),女,博士、教授,主要从事可再生能源利用方面的研究。luyuanwei@bjut.edu.cn
  • 基金资助:
    国家自然科学基金(52076006); 国家重点研发计划(2017YFB0903603)

Abstract: In order to explore the influence of molten salt with low chloride ion content (0.01%-0.05%,mass fraction) on the corrosion process of metal materials. By means of weight loss method, the corrosion behavior of 316L stainless steel in mixed molten salts with chloride ion mass fraction of 0.01%, 0.03% and 0.05% was studied. The results show that the minimum weight loss of 316L stainless steel in molten salt with chloride ion mass fraction of 0.03% is 0.4381 mg/cm2 after 360 h of corrosion test. The surface morphology analysis by SEM, EDS and XRD test showed that Ca(OH)2 appears in the corrosion products of stainless steel after adding chloride ions.During the formation of Ca(OH)2 mayhydroxyl ion are consumed, thus reducing the weight loss of stainless steel.

Key words: solar thermal power generation, corrosion, nitrates, stainless steel, chloride ion, X ray diffraction spectrum

摘要: 为了探究低氯离子含量(0.01%~0.05%,质量分数)对熔盐与金属材料腐蚀过程的影响,该文采用失重法研究316L不锈钢与氯离子质量分数为0.01%、0.03%、0.05%的混合硝酸盐的腐蚀行为。结果发现,在经过360 h的腐蚀实验后,316L不锈钢在氯离子质量分数为0.03%的熔盐中具有最小的失重量,其为0.4381 mg/cm2。采用SEM、EDS、XRD等方法对316L不锈钢表面形貌进行分析,结果表明,在添加氯离子后不锈钢的腐蚀产物中出现Ca(OH)2,在Ca(OH)2的形成过程会消耗氢氧根离子,从而降低了不锈钢失重量。

关键词: 太阳能热发电, 腐蚀, 硝酸盐, 不锈钢, 氯离子, X射线衍射谱图

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